Design of a Non-Orthogonal multi-band Carrierless Amplitude and Phase Modulated Indoor Visible Light Communication System using Adaptive Equalizers

Visible Light Communication (VLC) is a technology that can accompany high frequency fifth generation systems to enhance performance in user-dense areas. Multi - band Carrierless Amplitude and Phase (CAP) modulation can be used in VLC Systems to provide higher data rates by dividing the available bandwidth into multiple sub-carriers that can carry different data streams without overlapping. In this work, a non-orthogonal multi-band CAP Visible Light Communication system is designed using adaptive equalizers for different pulse shaping functions and compared with conventional multi-band CAP Visible Light Communication systems. The non-orthogonal multi-band CAP Visible Light Communication system achieves a bit error rate of around 10–3 for different pulse shaping functions. Among the Square Root Raised Cosine, Xia and Better-than Nyquist pulse shaping functions, the Better-Than Nyquist pulse shaping function has the best bit error rate performance, followed by Xia and Square Root Raised Cosine pulse shaping functions.